QA1 QA1 R224-150S Four Link Kit with QA1 9in. Housing Double Adjustable R224-150S

Transform your 1967–1970 Mustang with QA1’s complete 9” rear housing and 4-link suspension system. Engineered as a true performance upgrade, this setup replaces the factory leaf springs with a fully adjustable triangulated 4-link and double adjustable coilovers, giving you complete control over stance, handling, and ride quality. BUILT FOR HANDLING AND STRENGTH This system is designed to eliminate axle wrap, wheel hop, and the unpredictability of leaf-spring setups. QA1’s triangulated 4-link geometry maintains proper pinion angle and suspension alignment throughout the full range of motion, keeping your Mustang planted and stable through every corner and launch. DOUBLE ADJUSTABLE COILOVERS QA1’s double adjustable shocks give you independent control of rebound and compression. With 18 clicks per knob, you can fine-tune your setup for the street, autocross, or drag strip. Adjust ride quality and performance with confidence – no compromises required. READY FOR BIG POWER Each kit includes QA1’s fabricated 9” rear housing, built for strength and long-term reliability. Featuring heavy-duty 3” OD ¼” wall axle tubes, 31-spline alloy axles, and formed trailing arm brackets, this housing supports up to 800 HP while maintaining precise suspension geometry. RIDE HEIGHT FLEXIBILITY Adjust your ride height from factory stock to 3 inches lower, giving you control over stance without sacrificing drivability or geometry. EASY INSTALLATION QA1’s system uses self-fixturing weld-in brackets that ensure proper suspension geometry every time – no custom jigs or guesswork required. Once installed, the included 9” housing bolts directly to the QA1 4-link brackets, simplifying setup and ensuring consistent, professional results.